276 lines
8.2 KiB
JavaScript
276 lines
8.2 KiB
JavaScript
"use strict";
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/*
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This is the backend for voice channels in eaglercraft, it links with TeaVM EaglerAdapter at runtime
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Copyright 2022 Calder Young & ayunami2000. All rights reserved.
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Based on code written by ayunami2000
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*/
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window.initializeVoiceClient = (() => {
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const READYSTATE_NONE = 0;
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const READYSTATE_ABORTED = -1;
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const READYSTATE_DEVICE_INITIALIZED = 1;
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const TASKSTATE_NONE = -1;
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const TASKSTATE_LOADING = 0;
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const TASKSTATE_COMPLETE = 1;
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const TASKSTATE_FAILED = 2;
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class EaglercraftVoicePeer {
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constructor(client, peerId, peerConnection, offer) {
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this.client = client;
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this.peerId = peerId;
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this.peerConnection = peerConnection;
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this.stream = null;
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const self = this;
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this.peerConnection.addEventListener("icecandidate", (evt) => {
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if(evt.candidate) {
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self.client.iceCandidateHandler(self.peerId, JSON.stringify({ sdpMLineIndex: evt.candidate.sdpMLineIndex, candidate: evt.candidate.candidate }));
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}
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});
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this.peerConnection.addEventListener("track", (evt) => {
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self.rawStream = evt.streams[0];
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const aud = new Audio();
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aud.autoplay = true;
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aud.muted = true;
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aud.onended = function() {
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aud.remove();
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};
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aud.srcObject = self.rawStream;
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self.client.peerTrackHandler(self.peerId, self.rawStream);
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});
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this.peerConnection.addStream(this.client.localMediaStream.stream);
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if (offer) {
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this.peerConnection.createOffer((desc) => {
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const selfDesc = desc;
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self.peerConnection.setLocalDescription(selfDesc, () => {
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self.client.descriptionHandler(self.peerId, JSON.stringify(selfDesc));
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}, (err) => {
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console.error("Failed to set local description for \"" + self.peerId + "\"! " + err);
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self.client.signalDisconnect(self.peerId);
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});
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}, (err) => {
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console.error("Failed to set create offer for \"" + self.peerId + "\"! " + err);
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self.client.signalDisconnect(self.peerId);
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});
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}
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this.peerConnection.addEventListener("connectionstatechange", (evt) => {
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if(evt.connectionState === 'disconnected') {
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self.client.signalDisconnect(self.peerId);
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}
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});
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}
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disconnect() {
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this.peerConnection.close();
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}
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mute(muted) {
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this.rawStream.getAudioTracks()[0].enabled = !muted;
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}
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setRemoteDescription(descJSON) {
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const self = this;
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try {
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const remoteDesc = JSON.parse(descJSON);
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this.peerConnection.setRemoteDescription(remoteDesc, () => {
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if(remoteDesc.type == 'offer') {
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self.peerConnection.createAnswer((desc) => {
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const selfDesc = desc;
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self.peerConnection.setLocalDescription(selfDesc, () => {
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self.client.descriptionHandler(self.peerId, JSON.stringify(selfDesc));
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}, (err) => {
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console.error("Failed to set local description for \"" + self.peerId + "\"! " + err);
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self.client.signalDisconnect(self.peerId);
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});
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}, (err) => {
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console.error("Failed to create answer for \"" + self.peerId + "\"! " + err);
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self.client.signalDisconnect(self.peerId);
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});
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}
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}, (err) => {
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console.error("Failed to set remote description for \"" + self.peerId + "\"! " + err);
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self.client.signalDisconnect(self.peerId);
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});
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} catch (err) {
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console.error("Failed to parse remote description for \"" + self.peerId + "\"! " + err);
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self.client.signalDisconnect(self.peerId);
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}
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}
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addICECandidate(candidate) {
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try {
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this.peerConnection.addIceCandidate(new RTCIceCandidate(JSON.parse(candidate)));
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} catch (err) {
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console.error("Failed to parse ice candidate for \"" + self.peerId + "\"! " + err);
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self.client.signalDisconnect(self.peerId);
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}
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}
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}
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class EaglercraftVoiceClient {
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constructor() {
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this.ICEServers = [];
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this.hasInit = false;
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this.peerList = new Map();
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this.readyState = READYSTATE_NONE;
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this.taskState = TASKSTATE_NONE;
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this.iceCandidateHandler = null;
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this.descriptionHandler = null;
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this.peerTrackHandler = null;
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this.peerDisconnectHandler = null;
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this.peerDisconnectHandlerQuiet = null;
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this.microphoneVolumeAudioContext = new AudioContext();
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}
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voiceClientSupported() {
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return typeof window.RTCPeerConnection !== "undefined" && typeof navigator.mediaDevices !== "undefined" &&
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typeof navigator.mediaDevices.getUserMedia !== "undefined";
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}
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setICEServers(urls) {
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this.ICEServers.length = 0;
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if (urls.length == 0) {
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this.ICEServers = [ { urls: "stun:openrelay.metered.ca:80" }, { urls: "turn:openrelay.metered.ca:80", username: "openrelayproject", credential: "openrelayproject" }, { urls: "turn:openrelay.metered.ca:443", username: "openrelayproject", credential: "openrelayproject", }, { urls: "turn:openrelay.metered.ca:443?transport=tcp", username: "openrelayproject", credential: "openrelayproject" } ];
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} else {
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for(var i = 0; i < urls.length; ++i) {
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this.ICEServers.push({ urls: urls[i] });
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}
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}
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}
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setICECandidateHandler(cb) {
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this.iceCandidateHandler = cb;
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}
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setDescriptionHandler(cb) {
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this.descriptionHandler = cb;
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}
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setPeerTrackHandler(cb) {
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this.peerTrackHandler = cb;
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}
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setPeerDisconnectHandler(cb) {
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this.peerDisconnectHandler = cb;
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}
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setPeerDisconnectHandlerQuiet(cb) {
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this.peerDisconnectHandlerQuiet = cb;
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}
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activateVoice(tk) {
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if(this.hasInit) this.localRawMediaStream.getAudioTracks()[0].enabled = tk;
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}
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initializeDevices() {
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if(!this.hasInit) {
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this.taskState = TASKSTATE_LOADING;
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const self = this;
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navigator.mediaDevices.getUserMedia({ audio: true, video: false }).then((stream) => {
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self.localRawMediaStream = stream;
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self.localRawMediaStream.getAudioTracks()[0].enabled = false;
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self.localMediaStream = self.microphoneVolumeAudioContext.createMediaStreamDestination();
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self.localMediaStreamGain = self.microphoneVolumeAudioContext.createGain();
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var localStreamIn = self.microphoneVolumeAudioContext.createMediaStreamSource(stream);
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localStreamIn.connect(self.localMediaStreamGain);
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self.localMediaStreamGain.connect(self.localMediaStream);
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self.localMediaStreamGain.gain.value = 1.0;
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self.readyState = READYSTATE_DEVICE_INITIALIZED;
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self.taskState = TASKSTATE_COMPLETE;
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this.hasInit = true;
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}).catch((err) => {
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console.error(err);
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self.readyState = READYSTATE_ABORTED;
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self.taskState = TASKSTATE_FAILED;
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});
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}else {
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self.readyState = READYSTATE_DEVICE_INITIALIZED;
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self.taskState = TASKSTATE_COMPLETE;
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}
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}
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setMicVolume(val) {
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if(this.hasInit) {
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if(val > 0.5) val = 0.5 + (val - 0.5) * 2.0;
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if(val > 1.5) val = 1.5;
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if(val < 0.0) val = 0.0;
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this.localMediaStreamGain.gain.value = val * 2.0;
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}
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}
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getTaskState() {
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return this.taskState;
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}
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getReadyState() {
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return this.readyState;
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}
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signalConnect(peerId, offer) {
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if (!this.hasInit) initializeDevices();
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const peerConnection = new RTCPeerConnection({ iceServers: this.ICEServers, optional: [ { DtlsSrtpKeyAgreement: true } ] });
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const peerInstance = new EaglercraftVoicePeer(this, peerId, peerConnection, offer);
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this.peerList.set(peerId, peerInstance);
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}
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signalDescription(peerId, descJSON) {
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var thePeer = this.peerList.get(peerId);
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if((typeof thePeer !== "undefined") && thePeer !== null) {
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thePeer.setRemoteDescription(descJSON);
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}
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}
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signalDisconnect(peerId, quiet) {
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var thePeer = this.peerList.get(peerId);
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if((typeof thePeer !== "undefined") && thePeer !== null) {
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this.peerList.delete(thePeer);
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try {
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thePeer.disconnect();
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}catch(e) {}
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if (quoet) {
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this.peerDisconnectHandlerQuiet(peerId);
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} else {
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this.peerDisconnectHandler(peerId);
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}
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}
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}
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mutePeer(peerId, muted) {
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var thePeer = this.peerList.get(peerId);
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if((typeof thePeer !== "undefined") && thePeer !== null) {
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thePeer.mute(muted);
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}
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}
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signalICECandidate(peerId, candidate) {
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var thePeer = this.peerList.get(peerId);
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if((typeof thePeer !== "undefined") && thePeer !== null) {
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thePeer.addICECandidate(candidate);
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}
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}
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}
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window.constructVoiceClient = () => new EaglercraftVoiceClient();
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});
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window.startVoiceClient = () => {
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if(typeof window.constructVoiceClient !== "function") {
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window.initializeVoiceClient();
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}
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return window.constructVoiceClient();
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}; |